CN205684790U

CN205684790U - Gear keyless drill chuck

Info

Publication number: CN205684790U
Application number: CN201620544966.6U
Authority: CN
Inventors: 柳尧亭; 徐本钢
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-06-03
Filing date: 2016-06-03
Publication date: 2016-11-16
Anticipated expiration: 2026-06-03

Abstract

This utility model relates to machining instrument field and field of power tools, especially relates to a kind of gear keyless drill chuck.It includes rear pressing cover, rear body, main body, protheca, jaw and and driven wheel of differential；Rear body is arranged in main body；There is drive bevel gear one end of rear body；Drive bevel gear is arranged in main body, and engages with driven wheel of differential；Multiple driven wheels of differential line centered by the axis of drive bevel gear is uniformly arranged；The endoporus of driven wheel of differential is provided with female thread；One end of jaw is provided with the external screw thread used with screw-internal thread fit；Jaw hole and bevel gear hole is had in main body；One end of main body is fixedly installed in protheca, and the other end is provided with metapore and rear pressing cover；Rear pressing cover, rear body, drive bevel gear, main body and protheca are coaxially disposed；Female thread and external screw thread are multiple thread.This utility model ensure that after drill chuck clamped closed, it is possible to unclamps very easily, it is achieved manually can open the purpose of jaw, simple to operation.

Description

Gear keyless drill chuck

Technical field

This utility model relates to machining instrument field and field of power tools, especially relates to a kind of gear self-tightening drill point Head.

Background technology

Drill chuck is the instrument that mechanical processing industry and Power Tools Industries commonly use clamping drilling tool.

Drill chuck is usually and is made up of drill point set, degree of tightness ring, contiguous block, bonnet.In drill point overlaps, it location is axially Utilize contiguous block to realize, by circumference to stirring jack, make to move axially, accurately under the effect of degree of tightness ring female thread Ground self-centering also clamps drilling tool, needs to use equipped with different drilling tools (such as centre drill, drill bit, reamer, screw tap etc.) during work During drill chuck, location screw can be unclamped, after rotation segment to desired location, fastening location screw, it is achieved drill chuck multiplexing The movement of position.

Drill chuck currently on the market, is divided three classes from big to small according to chucking power: hand fastening drill clutch, spanner drill chuck and Keyless drill chuck.Three kinds of drill chucks are respectively arranged with pluses and minuses.Wherein, hand fastening drill clutch low cost, easy to operate, lightweight, application is wide General, but its chucking power is little, and precision is relatively low；The cost of spanner drill chuck is relatively low, is widely used, but its operation the most not side Just；Keyless drill chuck clamping force is big, and precision is higher, but it is relatively costly, and weight is relatively big, and inconvenient operation.

Along with the development in epoch, it is made to apply owing to the precision of keyless drill chuck is higher more and more,

The keyless drill chuck of existing existing market mainly has four kinds of structures, and the most flat pawl keyless drill chuck, gear self-tightening bore Chuck and female thread and external screw thread keyless drill chuck.

The drill chuck of these four structure is all to transfer power on jaw by one start screw, it is achieved jaw is in main body Move before and after in (precursor) jaw hole, and then realize clamping or unclamp drilling tool.

But it does not the most break away from aforesaid shortcoming, and because clamping force is big, usually makes between the screw thread of transmission power, shape Become excessive extruding force and frictional force even asphyxia by external pressure on the chest and abdomen, it is necessary to just can unclamp self-tightening by specific purpose tool and unclamp the drawback of drill chuck, Operating very inconvenient, and specific purpose tool is easily lost, this drill chuck is scrapped because not opening, and causes waste.

How by the existing suitable clamping force meeting job requirement of keyless drill chuck of screw thread transmission power, again can be real Show the most simple to operate, the manual keyless drill chuck that just can conveniently unclamp of use, be a most urgently to be resolved hurrily technical barrier.

Utility model content

The purpose of this utility model is to provide gear keyless drill chuck, asks solving technology present in prior art Topic.

This utility model provide gear keyless drill chuck, including rear pressing cover, rear body, main body, protheca, multiple jaw and with The driven wheel of differential that described jaw quantity is identical；

Described rear body is arranged in described main body；

One end of described rear body is provided with drive bevel gear；

The big end of described drive bevel gear is positioned close to one end of described rear body；

The other end of described rear body is provided with the connecting portion for being connected with external equipment；

Described drive bevel gear is arranged in described main body, and engages with described driven wheel of differential；

Multiple described driven wheels of differential line centered by the axis of described drive bevel gear is uniformly arranged；

The endoporus of described driven wheel of differential is provided with female thread；

One end of described jaw is provided with the external screw thread that the described screw-internal thread fit with described driven wheel of differential uses；

The jaw hole that is provided with in described main body allowing described jaw to pass through and for placing described driven wheel of differential Bevel gear hole；

One end of described main body is fixedly installed in described protheca, and the other end is provided with after being rotationally connected with described rear body Hole；

Described rear pressing cover is arranged on the other end of described main body, for being fixed in described metapore by described rear body；

Described rear pressing cover, described rear body, described drive bevel gear, described main body and described protheca are coaxially disposed；

Described female thread and described external screw thread are multiple thread.

Further, the other end of described jaw is provided with two clamping faces；

The angle of two described clamping faces is 120 °.

Further, described multiple-threaded lead angle α is 3.1 °≤α≤18.7 °.

Further, described jaw is provided with locating slot；

The length direction of described locating slot is parallel with the axis of described jaw, it is possible to the location division arranged in described main body Coordinating prevents described jaw from rotating.

Further, described location division is location screw；

Described location screw is detachably arranged in described main body.

Further, described main body rotates near one end of described rear body and is provided with rear enclosure.

Further, described rear body is provided with drive division away from one end of described drive bevel gear；

Described drive division and described rear enclosure secure fit, before working at drill chuck and after work, in the effect of rear enclosure Under carry out the driving that rotates, enable drill chuck initially to clamp or to unclamp drilling tool.

Further, described rear enclosure is provided with drive hole friction tight with described drive division.

Further, described connecting portion is for having female straight hole or taper hole.

Further, it is connected by jump ring between described rear enclosure with described rear body.

The gear keyless drill chuck that this utility model provides, drives drive bevel gear by the rotation of body after driving, enters And drive driven wheel of differential to rotate, be further driven to the movement of jaw, it is achieved that the Guan Bi of jaw and unclamping, and by jaw with from Multiple thread is used to be attached between dynamic bevel gear, it is ensured that after drill chuck at work clamped closed, it is possible to easily Unclamp, it is achieved manually can open the purpose of the jaw of drill chuck, simple to operation.

Accompanying drawing explanation

In order to be illustrated more clearly that this utility model detailed description of the invention or technical scheme of the prior art, below by right In detailed description of the invention or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below In accompanying drawing be embodiments more of the present utility model, for those of ordinary skill in the art, do not paying creativeness On the premise of work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

The explosive view of the gear keyless drill chuck that Fig. 1 provides for this utility model；

The rearview of the gear keyless drill chuck that Fig. 2 provides for this utility model；

Fig. 3 is the C-C sectional view of the gear keyless drill chuck shown in Fig. 2；

The front view of the main body of the gear keyless drill chuck that Fig. 4 provides for this utility model；

Fig. 5 is the D-D sectional view of the gear keyless drill chuck shown in Fig. 4；

The axonometric chart of the main body of the gear keyless drill chuck that Fig. 6 provides for this utility model；

The axonometric chart of the gear keyless drill chuck that Fig. 7 provides for this utility model；

Under the different number of starts of the gear keyless drill chuck that Fig. 8 provides for this utility model and different lead angle Torque curve figure.

Reference:

1: protheca 2: driven wheel of differential 3: main body

4: jaw hole 5: metapore 6: clamping face

7: jaw 8: drive bevel gear 9: rear body

10: rear pressing cover 11: rear enclosure 12: jump ring

13: drive hole 14: drive division 15: draw-in groove

16: screwed hole 17: locating slot 18: bevel gear hole

Detailed description of the invention

Below in conjunction with accompanying drawing, the technical solution of the utility model is clearly and completely described, it is clear that described Embodiment is a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, this The every other embodiment that field those of ordinary skill is obtained under not making creative work premise, broadly falls into this practicality Novel protected scope.

In description of the present utility model, " " center ", " on ", D score, "left", "right", " perpendicular it should be noted that term Directly ", " level ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, be only Must have specific for the ease of describing this utility model and simplification description rather than instruction or the device of hint indication or element Orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.

Additionally, term " first ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint phase To importance.

In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace Dress ", should be interpreted broadly " being connected ", " connection ", for example, it may be fix connection, it is also possible to be to removably connect, or integratedly Connect；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition Language concrete meaning in this utility model.

As shown in accompanying drawing 1-7, this utility model provides a kind of gear keyless drill chuck, including rear pressing cover 10, rear body 9, Main body 3, protheca 1, multiple jaw 7 and the driven wheel of differential 2 identical with described jaw 7 quantity；

Described rear body 9 is arranged in described main body 3；

One end of described rear body 9 is provided with drive bevel gear 8；

The big end of described drive bevel gear 8 is positioned close to one end of described rear body 9；

The other end of described rear body 9 is provided with the connecting portion for being connected with external equipment；

Described drive bevel gear 8 is arranged in described main body 3, and engages with described driven wheel of differential 2；

Multiple described driven wheels of differential 2 line centered by the axis of described drive bevel gear 8 is uniformly arranged；

The endoporus of described driven wheel of differential 2 is provided with female thread；

One end of described jaw 7 is provided with the external screw thread that the described screw-internal thread fit with described driven wheel of differential 2 uses；

The jaw hole 4 that is provided with in described main body 3 allowing described jaw 7 to pass through and described from mantle tooth for placing The bevel gear hole 18 of wheel 2；

One end of described main body 3 is fixedly installed in described protheca 1, and the other end is provided with and is rotationally connected with described rear body 9 Metapore 5；

Described rear pressing cover 10 is arranged on the other end of described main body 3, for being fixed in described metapore 5 by described rear body 9；

Described rear pressing cover 10, described rear body 9, described drive bevel gear 8, described main body 3 and described protheca 1 are coaxially disposed；

This utility model be applicable to all by power directly or indirectly through screw thread, be directly or indirectly delivered on jaw 7, Drive the keyless drill chuck that claw is movable.

Multiple-threaded lead angle in this utility model, is all with the central diameter of screw thread as standard.

One start screw is conducive to self-locking, is unfavorable for unclamping.Multiple thread is conducive to the transmission of power, i.e. fors facilitate gripping by, It is more beneficial for unclamping.And because the contact area increased between screw thread, make the clamping force as one start screw be dispersed in bigger Contact area on, make the contact pressure of screw thread unit or frictional force little compared with one start screw much afterwards, the lightest Loose ground opens drill chuck.Therefore, in this utility model, employ multiple thread as between driven wheel of differential 2 and jaw 7 Motion thread.

Drive bevel gear 8 and rear body 9 are set along in the metapore 5 of main body 3, and driven wheel of differential 2 is arranged on the cone of main body 3 In gear hole 18, and engage with drive bevel gear 8.Owing to rear body 9 is arranged in the metapore 5 of main body 3, and body 9 and main body 3 turns afterwards It is dynamically connected.For the body 9 stability in main body 3 after ensureing, it is to avoid it is scurried out, at rear body 9 during rotating in metapore 5 One end away from main body 3 arranges rear pressing cover 10, and rear pressing cover 10 is bolted to connection with main body 3, and then is fixed by rear body 9 In metapore 5, make rear body 9 can only carry out rotating and can not moving axially, it is ensured that stability during rear body 9 operation.

In use, by body 9 after rotating, drive drive bevel gear 8 to rotate, be further driven to nibble with drive bevel gear 8 The driven wheel of differential 2 closed rotates, and is driven jaw 7 in main body 3 by driven wheel of differential 2 by multiple-threaded effect the most again Move in jaw hole 4, to complete the Guan Bi of jaw 7 or to open.

Gear keyless drill chuck is bored by applicant in the impact of 1050W, with the drill hammer of a diameter of 12mm, respectively with Same lead angle 3 °, 4.7 °, 18 °, on the jaw 7 of same diameter, use single head and multiple thread, cement plate do The punching contrast experiment that one WANLIANG is more than thousand time, draws the data of lower list.

Contrast in following chart and data coordinates figure, it is possible to find out the multiple thread advantage when drill chuck is opened.

Table one

Number of starts	Plant capacity	The diameter of drill hammer	Lead angle	Unclamp moment of torsion (meansigma methods)
					Single head	1050W	Φ12mm	3°	13.1N.m
Two	1050W	Φ12mm	3°	9.4N.m
					Three	1050W	Φ12mm	3°	6.7N.m

Table two

Number of starts	Plant capacity	The diameter of drill hammer	Lead angle	Unclamp moment of torsion (meansigma methods)
					Single head	1050W	Φ12mm	4.7°	9.7N.m
Two	1050W	Φ12mm	4.7°	4.8N.m
					Three	1050W	Φ12mm	4.7°	3.4N.m

Table three

Number of starts	Plant capacity	The diameter of drill hammer	Lead angle	Unclamp moment of torsion (meansigma methods)
					Single head	1050W	Φ12mm	18°	8.6N.m
Two	1050W	Φ12mm	18°	4.7N.m
					Three	1050W	Φ12mm	18°	3.2N.m

From table one above, table two, table three and accompanying drawing 8, it can be seen that lead angle is the biggest, the head number of screw thread is more Many, unclamp moment of torsion required during jaw 7 the least, say, that unclamp during jaw 7 the most laborsaving.

It is preferred embodiment that the other end of described jaw 7 is provided with two clamping faces 6；

The angle of two described clamping faces 6 is 120 °.

In the present embodiment, jaw 7 is set to 3, and one end of jaw 7 arranges multiple thread, and the other end is provided with two Clamping face 6, three jaw 7 totally six clamping faces 6, and then by the cooperation of clamping face 6, it is possible to achieve object is carried out completely Clamping.

It is pointed out that in the present embodiment, the quantity of jaw 7 is 3, therefore two clamping faces 6 on jaw 7 Angle is 120 °, but the quantity of jaw 7 is not limited solely to 3, and it can also is that 4,5 etc., it is only necessary to by clamping face 6 Angle is revised as 90 °, 72 ° etc. accordingly, it is possible to the one end making all of jaw 7 have clamping face 6 is the most complete Fit.

It is preferred embodiment that described multiple-threaded lead angle α is 3.1 °≤α≤18.7 °.

By repeated multiple times experiment, when lead angle α is less than 3.1 °, clamping force will be excessive, even if multiple thread is also Can not strike with the hand open；And lead angle α more than 18.7 ° time, clamping force the most significantly reduces, even the most not clamping brill of one start screw Tool (drill bit).

Therefore this utility model is for existing keyless drill chuck, both can guarantee that clamping drilling tool meets industrial wanting Ask, can realize again just operating easily with hands requirement, it was concluded that having to comply with two conditions, i.e. lead angle α is 3.1°≤α≤18.7°。

It is preferred embodiment to be provided with locating slot 17 on described jaw 7；

The length direction of described locating slot 17 is parallel with the axis of described jaw 7, it is possible to determining of arranging in described main body 3 The cooperation of position portion prevents described jaw 7 from rotating.

Jaw 7 arranges locating slot 17, by the setting of locating slot 17, it is possible to coordinate with the location division in main body 3, right The moving direction of jaw 7 is defined, and avoids the jaw 7 rotation during movement, and then ensure that multiple folder Pawl 7 can perfectly coordinate.

It is preferred embodiment that described location division is location screw；

Described location screw is detachably arranged in described main body 3.

In the present embodiment, location division is location screw, i.e. arranges positioning spiro pit 16 in main body 3, will position screw It is arranged in positioning spiro pit 16.

When jaw 7 is carried out spacing by needs, screw-driving will be positioned, and make location screw be entered by positioning spiro pit 16 In locating slot 17, to reach the effect that the motion track of jaw 7 is defined, jaw 7 and main body 3 are formed one simultaneously Complete entirety.

When jaw 7 is safeguarded or dismantled by needs, loosen location screw so that it is depart from locating slot 17, and then Jaw 7 can be easy to be completely drawn out in jaw hole 4.

It is pointed out that location division in the present embodiment is location screw, but it is not limited solely to position screw This kind of structure, it can also is that other structure, as being pin, can be slide block etc., say, that as long as it can By limiting the motion track of jaw 7 with coordinating of locating slot 17, and then ensure that the jaw 7 stability in operation process is i.e. Can.

It is preferred embodiment that described main body 3 rotates near one end of described rear body 9 and is provided with rear enclosure 11.

In the present embodiment, rear enclosure 11 is set rear body 9, rear pressing cover 10 and main body 3 are covered, and rotate with protheca 1 It is tightly connected, it is possible to be effectively protected the environment of inside so that it is free from the influence of the external environment, reduces the entrance main body of pollutant Between 3 and rear body 9, and then ensure that the rotational stability between main body 3 and rear body 9 and rotate the life-span, further ensuring The service life of whole gear keyless drill chuck.

It is preferred embodiment that described rear body 9 is provided with drive division 14 away from one end of described drive bevel gear 8；

Described drive division 14 and described rear enclosure 11 secure fit, before working at drill chuck and after work, in rear enclosure 11 Effect under carry out the driving that rotates, enable drill chuck initially to clamp or to unclamp drilling tool.

Described drive division 14 coordinates with described rear enclosure 11, for carrying out the driving rotated under the effect of rear enclosure 11.

It is to say, in the present embodiment, it is attached by drive division 14 between rear body 9 and rear enclosure 11, rear enclosure 11 energy Enough by drive division 14, rear body 9 is driven, makes rear body 9 produce and rotate, and then give drive bevel gear 8, driven wheel of differential 2 one Individual rotatory force, gives the power that jaw 7 closes or unclamps further.

It is preferred embodiment that described rear enclosure 11 is provided with and the described friction tight drive hole of drive division 14.

In the present embodiment, drive division and drive hole are the structure shown in Fig. 1, i.e. on the sidewall of cylinder relative to two Side arranges two planes, and arranges the drive hole 13 of corresponding structure in rear enclosure 11, in joining of drive hole 13 and drive division 14 Under conjunction, it is possible to achieve the transmission of rotatory force.

It is pointed out that drive division and drive hole can be the structures in the present embodiment, but it is not limited solely to this The structure of sample, it can also is that other kinds of structure, as being square toes, can be the isostructural drive division of oval head, with And the drive hole coordinated with the drive division of this structure, say, that as long as it can be in drive hole 13 and the cooperation of drive division 14 Under, it is achieved the transmission of rotatory force.

It is preferred embodiment that described connecting portion is for having female straight hole or taper hole.

In the present embodiment, rear body 9 is attached with equipment by having female screwed hole 16.

It is pointed out that in the present embodiment, screwed hole 16 is straight hole or taper hole, it is also possible to be other kinds of screw thread Hole, as long as it can be together with other equipment be attached.

During after it may also be noted that, body 9 is the most a lot of with the connected mode of equipment, as can also is that bearing pin connection, hinge Connect, say, that as long as rear body 9 can be linked together by it with equipment.

It is preferred embodiment to be connected by jump ring 12 between described rear enclosure 11 with described rear body 9.

In the present embodiment, rear body 9 passes through to be provided with draw-in groove 15 in the part that rear enclosure 11 is stretched out, and jump ring 12 is arranged on draw-in groove In 15, and then rear enclosure 11 and rear body 9 are carried out axial connection, it is ensured that axial position between rear enclosure 11 and rear body 9, will not be carried out Move.

The connection that it is pointed out that rear enclosure 11 and rear body 9 in the present embodiment is that jump ring 12 connects, but its not only office Being limited to such a kind of connected mode, it can also is that other connected mode, as being bearing pin connection etc., as long as it can Axial freedom between rear enclosure 11 and rear body 9 is retrained.

The gear keyless drill chuck that this utility model provides, drives drive bevel gear 8 by the rotation of body 9 after driving, And then drive driven wheel of differential 2 to rotate, it is further driven to the movement of jaw 7, it is achieved that the Guan Bi of jaw 7 and unclamping, and will folder Multiple thread is used to be attached between pawl 7 and driven wheel of differential 2, it is ensured that after clamped closed, it is possible to unclamp very easily, Realize manually can opening the purpose of jaw 7, simple to operation.

Last it is noted that various embodiments above is only in order to illustrate the technical solution of the utility model, rather than it is limited System；Although being described in detail this utility model with reference to foregoing embodiments, those of ordinary skill in the art should Understand: the technical scheme described in foregoing embodiments still can be modified by it, or to the most some or all of Technical characteristic carries out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from this practicality new The scope of type each embodiment technical scheme.

Claims

1. a gear keyless drill chuck, it is characterised in that include rear pressing cover, rear body, main body, protheca, multiple jaw and with institute State the driven wheel of differential that jaw quantity is identical；

Described rear body is arranged in described main body；

One end of described rear body is provided with drive bevel gear；

The jaw hole that is provided with in described main body allowing described jaw to pass through and for placing the cone of described driven wheel of differential Gear hole；

One end of described main body is fixedly installed in described protheca, and the other end is provided with the metapore being rotationally connected with described rear body；

Gear keyless drill chuck the most according to claim 1, it is characterised in that the other end of described jaw is provided with two Clamping face；

The angle of two described clamping faces is 120 °.

Gear keyless drill chuck the most according to claim 1, it is characterised in that described multiple-threaded lead angle α is 3.1°≤α≤18.7°。

Gear keyless drill chuck the most according to claim 1, it is characterised in that be provided with locating slot on described jaw；

The length direction of described locating slot is parallel with the axis of described jaw, it is possible to coordinate with the location division arranged in described main body Prevent described jaw from rotating.

Gear keyless drill chuck the most according to claim 4, it is characterised in that described location division is location screw；

Described location screw is detachably arranged in described main body.

Gear keyless drill chuck the most according to claim 1, it is characterised in that described main body is near one end of described rear body Rotation is provided with rear enclosure.

Gear keyless drill chuck the most according to claim 6, it is characterised in that described rear body is away from described drive bevel gear One end be provided with drive division；

Described drive division and described rear enclosure secure fit, before working at drill chuck and after work, enter under the effect of rear enclosure The driving that row rotates, enables drill chuck initially to clamp or to unclamp drilling tool.

Gear keyless drill chuck the most according to claim 7, it is characterised in that described rear enclosure is provided with and described drive division Friction tight drive hole.

Gear keyless drill chuck the most according to claim 1, it is characterised in that described connecting portion is female directly for tool Hole or taper hole.

Gear keyless drill chuck the most according to claim 6, it is characterised in that logical between described rear enclosure and described rear body Cross jump ring to connect.